Home-Based Gait Speed Assessment: Normative Data and Racial/Ethnic Correlates Among Older Adults

Abstract

ObjectivesTo determine home-based gait speed performance and its associations with sociodemographic and health-related factors among older adults. DesignCross-sectional analysis of a nationally representative US population sample. Setting and participantsHomes of Health and Retirement Study (HRS) participants. MethodsWalk test data measured at home over 2.5 m were aggregated for 6983 individuals, aged ≥65 years (mean age 74.8 ± 6.9 years, 54.2% women), from the 2006 and 2008 HRS waves. Means for gait speed at normal pace were determined for demographic and clinical groupings; association of gait speed with demographic, socioeconomic status, and health factors were examined. Four-year mortality was predicted from baseline slow gait status defined using demographic-based cutoff scores as well as commonly recommended cutoff scores (100 or 60 cm/s). ResultsHome-based gait speed (cm/s) means were lower for female than male (9.6% difference), older than younger (18.0% difference), African American than white (20.5% difference), and Hispanic than Non-Hispanic (10.3% difference) participants. Differences by age group, race, and ethnicity remained significant within sexes (P < .001). Lower speed was associated with African American race and all health problems; higher speed was associated with higher socioeconomic status and alcohol consumption. Four-year mortality was predicted by slow gait status. Predictive validity was, in general, higher for slow gait cutoff scores defined by demographic characteristics. Conclusions and implicationsMean gait speed measured at home differs among older (aged ≥65 years) US resident population groups defined by sex, age, race, ethnicity, health status, and combinations of these factors, and predicts 4-year mortality when substantially slower than group-based norms. These findings may assist researchers and clinicians in determining normal and abnormal gait performance in older adults in community settings.